Grinding machine



J. E. GILBERT aanname MACHINE Filed may 16'. 1924 :s sheets-sheet 1 .6 p Y *mmw v .J. E. GILBERT GRINDING MACHINE oct. 27, 192s. 1,559,245

Filed uay 16. 1924 s sneefss'nnt 2 l Max Oct. 27, 1925.

. J. E. GILBERT GRINDING MACHINE` 5 Sheets-Sheet 3 Filed May 16. 1924 Maf i i l Mw Q www: QR QA m QQ, Qmv@ NCM/ `l`|-l Q 1 mm A LAN .r. A il ml. I U .iW/MV-WI4HII llllu i mv%\ N v V.- L mw l Nm@ NM vm Nh @M5 wm NQ www mv um* Nmv/ Patented Oct. 27, 1925. l v'- @JAMES einem, "orY mnwnunnnywrseousm.

.GBINDING Macallan f nppiicanonifiieanay 16, 1924. .-Seril. l'aoju'sa..v

.To .aZZ .w/wfm- .may concern,.-

h,Beit known thatLfJAMnsE. GiLBnnT, a citizen; of v the United, States, residing .at Milwaukee, inthe county o'fMilwaukee and State of Wisconsin, haveinventedfa cert-ain new and `useful Improvement in 4(rrinding -Which v,are .readily applicable' on standard lathes-,commonlyusedin. machines shops forY Working upon rvarious sorts Vof materiala moreparticularly metals.

The object ofrtheinvention isito builda mechanism ofy this, class, ,readily L.attac-hable an d deta-(fzhable to the lathe, itself, .which is' soconstructed that it may be applied at either side of the lathe iand may be `used for either internal orI external vgrinding in connection withy .objects= to.be. operated upon. The vfurther object is'tozprovide meansby which theinternaligrinding,tool ofi, the ma.- chine may he fed ,v onto .i the ,Work either entirely ,independently `of the mechanism which operatesat or,in,unison With it, in the latter case being held rigid With reiference thereto. v

.The invention. consists, in mechanism capable-.of attainingthe foregoingland .other objects .which can @be :easily and Cmplatively cheaply made; .whichrissatisfaotory andiefficient in voperation and `isnotfreadily liable-to. get out vof order. l

fMore particularly, v,the .invention consists in numerous features .and ,details of constructionwvhioh will rbc hereafter more fully set forth` in the` sipccification'and claims.

Referring to the.drawings `in lwhich like numerals designate l. the same, parts throughout the several views: n l Figure -l-isa side and FigurejQ la plan view of aconventional Vformfof metal working lathehavfin ,the/device of this'invention in its preferrec form applied. thereto'.

4Figure .3 is a central, sectional, detail viexv, `taken on .the line y3--3 of "Figure 2. ,Figure .4 is an end, `detail .view 'on ,the line l-Aeof Figure. Y y n ,Figure5i-san enlarged`, ,plan view of the mechanism vof i. thisinvention, i With .special reference. to the larger or exterior` grinding Wheel. I

lEigure A6 isa side elevation of the device of Fig.5.

Figure 7 is a central, sectional View, corresponding to; that of Figure 3l of -a'modiied form 'of construction ofmonntng-for-the interior grin'dingtool byfthe use'of-Which theL grinding Wheel may' he "moved' laterally of' the grinding. machine-proper, specifically the mechanism W-hichrotates it.

Figures r8 and 9 are e'nd'and perspective.

views of a "special form of Vnut 1 used in 'the structure of1F1gure`7,"the' former View' being taken onf line 8-#8 of Figure/T.V

Figure l'O-is aperspective view o'f afre-k ciprocal 'shaft which ,slidesfthrough' thenut of Figures 8 and' 9. v

For the purposes of illustra-tingthe mounting of the vmef'zhanism of .this invention;

lllioiuresl andv 2 show a conventional'form oflathehaving abe'd 14,'he'ad stock 16,

tailY stocklS, tool carriage 20, reciprocal by means ofhan'd Wheel/22 andtool stock '24 cross-Wise of Vthe carriage on'proper operation of handle 26. "Power isy conventionally applied to such allatheby `means of'belts, not shown, traversingayselec'ite'd portion `of step pulley 28 driving uWork chuck 3() which inthe-jdrfawings' is .shown as carrying aE hollow c'y'flin'olrical m'eniber 32`to"be interiorly ground. Thegrinding tool of this invern,

tion ismounted upon an independent, genenallyflatjbase orframe 34 adapted 'to rest upon anyselected number of horizontally disposed, ,superimposed discs .or

ci'ficallyfbolt-,;3 8 rising 'from too 2stock 24: and 4-passingthroughl elongated 'slot .40 in the'base, vwhereby on properly manipulating-.nut42.10n' vtool post 38,-'base'34' and the iinechanism carried Iby it may he adj-usted' thelength of slot 40 in f v'any ,direct-ion 5111111936` placed Yupon .conventional tool post, lsp'ef desired l positioning-of the mechanism ,carl

ried. by base 34 With reference vto Work in the :lathe vmay be obtained.

4suitably ,journaled inthe zright handhereafter referred .to ,as the ffront--endl of basevorlfnamellxis hollow shaft .46 carryingat oneenda conventional, comparatively large grinding `,Wheel 48, `preferablybut not necessarily enclosed Within a protecting guard .50, open only` at52 toiallow a portion o'ffthe circumference of ,Wheel 48 to engage apiece of work, specifically, as shown, a

shaft 54 to be ground on its exterior circumference. On the opposite end of hollow shaft 46 is a pulley 56 to which power is com- -municated by means of a conventional belt i of base 34 and this sleeve 46 is selectively securable in non-rotative position by means of a lock or latch 66 reciprocal through said housing 64 against the action of spring 68 from the position shown in Figure 3 to a depressed position in which the lower end port-ion or point 70 of latch 66 enters recess 72 provided for it in the circumference of sleeve 46. Latch 66 is movable as described `by an operators pressing downward, as

shownV in Figure 3 on handle 74, provided for the purpose. It is lockable in the depressed position in notch 72 by, in that position, rotating the handle 74 and consequently the latch until pin 7 6 ceases to be in register with the notch (Fig. 7) provided for it in plug 82 and engages the bottom surface 7 8 of the plug. The entire locking mechanism is, for convenience of manufacture, mounted in this plug which is, as clearly f shown in Figures 3 and 7 screw threaded into an opening provided for it in the eX- terior wall of housing 64. Grinding wheel 48 is rigidly secured upon hollow shaft 46 by suitably threaded conventional nut 86 and pulley 56 is correspondingly held on the hollow shaft by a similar nut 88. The ends of shaft 46 beyond these nuts 86 and 88 are slotted to form tapering screw threaded lingers 90 engaged by laterally tapered nuts 92 and 94 which, when in the position of Figure 3 compress these fingers 90 together and rigidly lock them upon a central, solid shaft 96 carrying at one end-specifically as shown the left hand end-a small grinding wheel 98, capable of use in grinding the interior of work such as cylinder 32. With the construction just described, grinding wheel 98 and shaft 96 are for practical purposes rigid with hollow shaft 46 and therefore rotate with it when the motor 60 drives the hollow shaft and as shaft 96 is rigid with hollow shaft 46, it is necessary to manipulate the entire tool carriage of the lathe in order to reciprocate wheel 98 lengthwise of the axis of cylinder 32 to be worked upon.

ln thc alternative construction of Figure 7,' shaft 100, corresponding in many respects with shaft 96, is provided at its lefthand or working end, as viewed in Figure 7, nwith key ways 102, slidable'upon inwardly projecting keys 104 on the interior of special nut 106 substituted for nut 94 of the preferred construction. In the construction of Figure 7, nut 92 is left so loose that it does not cause fingers 90 to grip shaft 100, or this nut may be entirely omitted without departing from the invention. Shaft 100 is provided at itsy right hand end, as shown in the drawings, with a conventional form of handle 108 by means of which the operator may, while hollow shaft 46 is rotating, and the lathe tool carriage is standing still, reciprocate the shaft 100 through hollow shaft 46, thereby moving grinding wheel 98, being simultaneously rotated through the agency of hollow shaft. 46 and keys 104, forward and backward along the length of work case 32.

The key ways 102 in the solid shaft are wholly unnecessary when the mechanism is to be operated as described in connection with Figure 3 but they may be provided, as indicated in Figure 3 in shaft 96 without departing from the invention and, when this is done, all that is necessary to convert the device from one construction to the other is to substitute nut 106 for nut 94 and provide a handle corresponding in function to handle 108 on shaft 96-this while simultaneously loosening or removing nut 92.

It is obvious that by loosening nuts 92 and 94, the operator may reciprocate shaft 96 through hollow shaft 46 to any position desired for wheel 98 and then 'by tightening the nuts 92 and 94, secure the parts in a new position.

From the foregoing, it will be seen that this invention pro-vides a grinding tool which is practically universally adjustable with reference to the tool carriage of a lathe or the like; that it carries a large wheel for external grinding; a. small wheel for internal grinding; that the latter wheel may be reciprocated while rotating lengthwise of the work being treated either by moving the entire grinding mechanism carried by the tool carriage of the lathe, or by manipulating the grinding wheel itself alone with reference to the driving mechanism. By using the latch 66, the tubular shaft 46 is held stationary so that nuts 88, 94, 86 and 92 may be readily tightened orv loosened for the purposes heretofore described. In actual practice one grinding wheel is wholly removed from the machine while the other is in use; this because their working uses require different speeds and the large wheel would not stand the speed of the smaller wheel without going to pieces.

rlhe shaft 96 is reversible through hollow shaft 46 so wheel 98 may be used at either side of the machine.

Having thus described my invention, what l claim as new and desire to secure by Let-ters Patent is:

l. In mechanism of the class described, a support, a hollow tool carrying shaft rotatably journaled in said support, a second tool carrying shaft within and longitudinally movable with respect to said hollow shaft to adjust the posit-ion of the tool carried thereby with respect to said supporty and with respect to the tool carried by said hollow shaft, means carried by and movable with respect to said hollow shaft for vsecuring the two shafts together whereby they may be rotated in unison, .and mea-ns to lock said hollow shaft against movement to facilitate manipulation of the means for securing the shafts together.

2.. In mechanism of the class described, a support, a hollow tool carrying shaft ro'- tatably journaled in said support, a second tool carrying shaft within and longitudinally movable with resp'ect to said hollow shaft to adjust the position of the tool carried thereby with respectto said support and with respect to the tool carried by said hollow shaft, means carried by and rotatable with respect to said hollow shaft for securing the two shafts together whereby they may be rotated in unison, and means to lock said hollow shaft against rotation to facilitate manipulation of the means for securing the shafts together.

3. In mechanism of the class described, a support, a hollow tool carrying shaft rotatably journaled in said support, a second tool carrying shaft within and longitudinally movable with respect to said hollow shaft to adjust the position of the tool carried thereby with respect to said support and with respect to the tool carried by said hollow shaft, means carried by and movable with respect to said hollow shaft for securing the two shafts together whereby they may be rotated in unison, a pin movable into engagement with said hollow shaft to lock the same against movement to facilitate manipulation of the means for securing the shafts together, a spring constantly tending to move said pin out of engagement with said shaft, vand means to latch said pin in engagement with said shaft, said pin, said spring and said latch means all being carried by a member detachably carried by said support.

4. In mechanism of the class described, a support, a hollow tool carrying shaftk rotatablyjournaled in said support, a second tool carrying shaft within and longitudinally movable with respect to said hollow shaft to adjust the position of the tool carried thereby with respect to said support and with respect to the tool carried by said hollow shaft, means engaging and movable with respect to one of said shafts for securing the two shafts together whereby they may be rotated in unison, and means to lock lsaid shaft against movement to facilitate manipulation of the means for securing the shafts together.

In witness whereof, I have hereunto subscribed my name.

JAMES E. GILBERT. 

